Publicado por: elmasvital en 07 de Octubre de 2005, 08:29:00
Publicado por: elmasvital en 07 de Octubre de 2005, 08:30:00
un lcd
Ojo que no es exacto... pierde algun que otro microsegundo...
#include <16F628.h>
#use delay (clock=4000000)
#fuses intrc_io,NOWDT,NOBROWNOUT,NOPROTECT,PUT,NOLVP,NOMCLR //ordenes para el programador
#define use_portb_lcd TRUE //definir portb lcd
#include<lcd.c> //libreria manejo lcd
#define INTS_PER_SECOND 25 // (20000000/(4*16*250*10))
int8 seconds; // A running seconds counter
int8 int_count; // Number of interrupts left before a second has elapsed
#INT_TIMER2 // This function is called every time
void clock_isr() { // timer 2 overflows (250->0), which is
// approximately 125 times per second for
if(--int_count==0) { // this program.
++seconds;
int_count = INTS_PER_SECOND;
}
}
void main() {
int8 contador;
int_count = INTS_PER_SECOND;
lcd_init();
setup_timer_2(T2_DIV_BY_16, 250, 10);
set_timer2(0);
enable_interrupts(INT_TIMER2);
enable_interrupts(GLOBAL);
int_count = INTS_PER_SECOND;
seconds = 0;
contador = 1;
while(TRUE) {
if (contador!=seconds)
{
printf(lcd_putc, "f%u seconds", seconds);
contador=seconds;
}
}
}
PD: cómo se hace para que presente el texto identado?
Publicado por: elmasvital en 07 de Octubre de 2005, 08:45:00
1. contine un fallo en el send_byte, le falta activar el bit rw=1 por lo que en concreto mi lcd de 1x16 no funcionaba. Si tu lcd da problemas usa esta a ver que tal.
2. no configura bien los lcd de 1x16
para usarla en modo 1x16 debeis definir antes de el include del archivo
#define use_lcd_1x16
ahí va
///////////////////////////////////////////////////////////////////////////
//// LCDD.C ////
//// Driver for common LCD modules ////
//// ////
//// lcd_init() Must be called before any other function. ////
//// ////
//// lcd_putc(c) Will display c on the next position of the LCD. ////
//// The following have special meaning: ////
//// f Clear display ////
////
Go to start of second line ////
//// Move back one position ////
//// ////
//// lcd_gotoxy(x,y) Set write position on LCD (upper left is 1,1) ////
//// ////
//// lcd_getc(x,y) Returns character at position x,y on LCD ////
//// ////
///////////////////////////////////////////////////////////////////////////
//// (C) Copyright 1996,2003 Custom Computer Services ////
//// This source code may only be used by licensed users of the CCS C ////
//// compiler. This source code may only be distributed to other ////
//// licensed users of the CCS C compiler. No other use, reproduction ////
//// or distribution is permitted without written permission. ////
//// Derivative programs created using this software in object code ////
//// form are not restricted in any way. ////
///////////////////////////////////////////////////////////////////////////
// MODIFICADO POR VITAL para que acepte todos los lcd"s sin problemas //
// As defined in the following structure the pin connection is as follows:
// D0 enable
// D1 rs
// D2 rw
// D4 D4
// D5 D5
// D6 D6
// D7 D7
//
// LCD pins D0-D3 are not used and PIC D3 is not used.
// Un-comment the following define to use port B
// #define use_portb_lcd TRUE
struct lcd_pin_map { // This structure is overlayed
BOOLEAN enable; // on to an I/O port to gain
BOOLEAN rs; // access to the LCD pins.
BOOLEAN rw; // The bits are allocated from
BOOLEAN unused; // low order up. ENABLE will
int data : 4; // be pin B0.
} lcd;
#if defined(__PCH__)
#if defined use_portb_lcd
#byte lcd = 0xF81 // This puts the entire structure
#else
#byte lcd = 0xF83 // This puts the entire structure
#endif
#else
#if defined use_portb_lcd
#byte lcd = 6 // on to port B (at address 6)
#else
#byte lcd = 8 // on to port D (at address 8)
#endif
#endif
#if defined use_portb_lcd
#define set_tris_lcd(x) set_tris_b(x)
#else
#define set_tris_lcd(x) set_tris_d(x)
#endif
//MODIFICADO POR VITAL... si vas a usar lcd"s de 1 linea por 16 declara la varible use_lcd_1x16 en tu programa
// así --> #define use_lcd_1x16 antes del include de este archivo
#if defined use_lcd_1x16
#define lcd_type 0
#else
#define lcd_type 2 // 0=5x7, 1=5x10, 2=2 lines
#define lcd_line_two 0x40 // LCD RAM address for the second line
BYTE const LCD_INIT_STRING[4] = {0x20 | (lcd_type << 2), 0xc, 1, 6};
// These bytes need to be sent to the LCD
// to start it up.
// The following are used for setting
// the I/O port direction register.
struct lcd_pin_map const LCD_WRITE = {0,0,0,0,0}; // For write mode all pins are out
struct lcd_pin_map const LCD_READ = {0,0,0,0,15}; // For read mode data pins are in
BYTE lcd_read_byte() {
BYTE low,high;
set_tris_lcd(LCD_READ);
lcd.rw = 1;
delay_cycles(1);
lcd.enable = 1;
delay_cycles(1);
high = lcd.data;
lcd.enable = 0;
delay_cycles(1);
lcd.enable = 1;
delay_us(1);
low = lcd.data;
lcd.enable = 0;
set_tris_lcd(LCD_WRITE);
return( (high<<4) | low);
}
void lcd_send_nibble( BYTE n ) {
lcd.data = n;
delay_cycles(1);
lcd.enable = 1;
delay_us(2);
lcd.enable = 0;
}
void lcd_send_byte( BYTE modo, BYTE n ) {
lcd.rs = 0;
lcd.rw = 1; // MODIFICADO POR VITAL... fallo de la rutina... el protocolo necesita este bit
while ( bit_test(lcd_read_byte(),7) ) ;
lcd.rs = modo; //MODIFICADO POR VITAL... aqui addres lleva a confusión... este bit define el modo comando o texto
delay_cycles(1);
lcd.rw = 0;
delay_cycles(1);
lcd.enable = 0;
lcd_send_nibble(n >> 4);
lcd_send_nibble(n & 0xf);
}
void lcd_init() {
BYTE i;
set_tris_lcd(LCD_WRITE);
lcd.rs = 0;
lcd.rw = 0;
lcd.enable = 0;
delay_ms(15);
for(i=1;i<=3;++i) {
lcd_send_nibble(3);
delay_ms(5);
}
lcd_send_nibble(2);
for(i=0;i<=3;++i)
lcd_send_byte(0,LCD_INIT_STRING);
}
void lcd_gotoxy( BYTE x, BYTE y) {
BYTE address;
if(y!=1)
address=lcd_line_two;
else
address=0;
address+=x-1;
lcd_send_byte(0,0x80|address);
}
void lcd_putc( char c) {
switch (c) {
case "f" : lcd_send_byte(0,1);
delay_ms(2);
break;
case "
" : lcd_gotoxy(1,2); break;
case "" : lcd_send_byte(0,0x10); break;
default : lcd_send_byte(1,c); break;
}
}
char lcd_getc( BYTE x, BYTE y) {
char value;
lcd_gotoxy(x,y);
while ( bit_test(lcd_read_byte(),7) ); // wait until busy flag is low
lcd.rs=1;
value = lcd_read_byte();
lcd.rs=0;
return(value);
}
Publicado por: gomalejo en 18 de Octubre de 2005, 12:16:00
Hola, en esta direccion podran encontrar muchas librerias y ejemplos para trabajar con C.http://user.chollian.net/~ascbbs/appnote.htm
Publicado por: MGLSOFT en 18 de Octubre de 2005, 13:46:00
Y esto??
http://miarroba.com/foros/ver.php?foroid=46840&temaid=1654587&marcar=rutinas